Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0BOL callsign genealogy
Currently held by YOUMANS, RAYMOND E
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by K0BOL's current licensee, walking backwards.
- YOUMANS, BILLCOgranted 2015-03-09cancelled 2018-02-13
Successor callsigns
Callsigns held now by people who previously held K0BOL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0BOL, oldest first.
- YOUMANS, RAYMOND E KS2006-05-16 → cancelled 2018-01-17
- YOUMANS, BILL CO2018-02-13 active